Nowosielce is a village in the administrative district of Gmina Zarszyn, within Sanok County, Subcarpathian Voivodeship, in south-eastern Poland. It lies approximately 5 km (3 mi) south-east of Zarszyn, 11 km (7 mi) west of Sanok, and 52 km (32 mi) south of the regional capital Rzeszów.